Clutching device



June 9, 1936.

E. J. TENNY CLUTQHING DEVICE Filed Feb. 26, 1934 M Q &w W sr w INVENTOR few/mp d TEAM/E) ATTORNEY Patented June 9, 1936 UNITED STATES PATENT OFFICE CLUTCHING DEVICE Edward J. Tenny, Paterson, N. J.

Application February 26, 1934, Serial No. 712,882

4 Claims.

The invention relates to clutching means as embodied, by way of example, in a chuck or holding member for use with winding machines, as in the winding of paper or fabric on tubes. These 5 tubes, which are usually of cardboard, are adapted to receive in the ends a pair of the chucks to mount a tube on a pair of rotatable spindles to which an axial adjustment or thrust may be imparted. The inner ends of these chuck members are designed to fit wit hin and to wedge in the respective opposite ends of a tube while their outer ends are adapted suitably rotatable spindles.

It is an object of the present to be secured to invention to provide a clutching device of this nature wherein the expanding force for looking a tube end to the employed for this purpose.

A further object of the invention resides in the provision of chuck means which will not tend to damage or effect Wear of the tube held thereby, as is the case with the cone type heretofore utilized in the mounting of tubes.

Still another object of the invention resides in the provision of a tube chuck of simple construction and which may be readily manufactured and assembled and at relatively low cost.

The invention has for a further object the provision of a tube chuck which is plied to a tubing machine or the conveniently aplike and the tube to be mounted thereon, and which will admit also of ready disengagement of th chuck.

e tube from the In carrying out the invention, a tapered body member, adapted at its larger end to be rigidly secured to a carrying spindle, is provided with a plurality of longitudinal undercut grooves fol lowing the taper of the body member. Over this member is designed to reciprocate an annular disk member concentric with and encircling said body member and provided wi th a plurality of radial slots extending outwardly from the central open portion of the disk. The radial slots are designed to receive and guide jaw elements of the chuck, a jaw element to this end having an upstanding arm portion constituted by two walls which overhang the opposite sides of a slot.

vided with a key portion along designed to dove-tail into a gr portion of the chuck member.

Extending at right angles from the arm is the holding portion of a jaw element which is prothe bottom and oove of the body This key portion is tapered similarly to the taper of the groove, while the opposite face of the holding portion is parallel to'the axis of the body member, so that, as a jaw element reciprocates in its corresponding groove, the said opposite face will thus always 5 remain in planes parallel to one another and will thereby accommodate itself to the particular diameter of a tube into the end of which the chuck is to be fitted.

The progression of the jaw elements either 10 outwardly or inwardly is limited, in the latter instance by eventual contact of the outer ends of the jaw elements with one another, and in the former instance by contact of the arm of an element with the bottom of a radial slot of the car- 15 rier member.

The nature of the invention, however, will best be understood when described in connection with the accompanying drawing, in which:

Fig. 1 is an elevation,.with portion shown in vertical section, of the novel clutching means.

Fig. 2 is an end elevation thereof.

Figs. 3, 4 and 5 are views, on a reduced scale, showing respectively an elevation of the body member, an elevation of the carrier member, and a perspective view of one of the plurality of jaw elements utilized in the device.

Referring to the drawing, I0 designates a body member having the axially recessed hub H adapted to receive a spindle or the like l2 upon which the device as a whole may be rigidly secured,; as by means of a set screw l3 passing through the hub. The portion of the body member beyond the hub is tapered, its larger end being at the hub portion; and the body member is preferably of a generally triangular crosssection, with its respective surfaces provided with longitudinal and undercut grooves l5, I6 and I1 following substantially the taper of the body portion.

Into these grooves are adapted to fit respective jaw elements I8, [9 and 20, each jaw element located therein being tapered along its under surface reversely to the taper of the grooves and of the same degree; and each element embodies also a key portion 2| to dove-tail into a corresponding groove. The opposite surface 22 is substantially parallel to the axis of the body member; and, through the complementary engaging surfaces of the body member and a jaw element, this upper surface of such jaw element will constantly remain in parallel planes irrespective of its longitudinal position along the body member.

These various jaw elements are designed to be supported by and further united to the body member by means of an annular carrier disk 25 having a plurality of radial slots 26 corresponding in number to the number of jaw elements, said carrier member encircling the body member and being concentric therewith, as indicated.

To unite .a jaw element to this carrier member, the former is provided with an upstanding arm located substantially at right angles to the holding portion of such jaw element, and having two separated walls 21 and 28 which overhang the opposite lateral edges of a slot, the one wall, as wall 28, affording an abutment for the end of a tube (not shown) and adapted to be fitted over the jaws. This permits the upstanding arm to ride loosely in a radial slot in accordance with the position of a jaw element along the body portion, the inward movement of a jaw element being limited by contact of its upstanding arm with the bottom of a radial slot. When the jaw elements have been moved outwardly sufficiently to provide contact between their projecting ends, as indicated in the dotted line position, Fig. 1 of the drawing, it will, of course, be understood that no further movement in this direction is possible.

It Will thus be noted that the various parts are all locked together; and it will be apparent that assembly of the same would be impossible unless one of the faces, for example the face 39, of the body member were made separable from the body portion as a whole. This face is therefore constituted as a removable plate which may be secured, for example, by means of screws 3| to the said body portion proper, the lateral edges of said plate being arranged to overhang the corresponding grooves to effect the dove-tailing of a key 2| therein.

I claim:

1. A clutching device adapted to fit at one end .a spindle, said device comprising a tapered body member having undercut longitudinal surface grooves, jaw elements movable in the respective grooves, and an annular reciprocable disk member encircling said body member, non-rotatable with respect thereto and only one of said members being axially movable and the former having radial slots adapted 'to engage portions of the jaw elements to retain said jaw elements in their proper position longitudinally of the body member and to permit movement of the elements in said radial slots during their longitudinal adjustment on the body member.

2. A clutching device adapted to fit at one end a spindle, said device comprising a tapered body member having undercut longitudinal surface groves, jaw elements movable in the respective grooves and having a right-angled flanged arm aifording an abutment, and an annular reciprocable disk member encircling said body member, non-rotatable with respect thereto and only one of said members being axially movable and the former having radial slots adapted to receive the arm of the jaw elements to retain said jaw elements in their proper position longitudinally of the body member and to permit movement of the elements in said radial slots during their longitudinal adjustment on the body member.

3. A clutching device adapted to fit at one end a spindle, said device comprising .a tapered body member of polygonal cross-section and having undercut longitudinal surface grooves, at least one face of the body member embodying a plate separable from the body member proper, means to removably secure said plate to the body member proper, jaw elements movable in the respective grooves and having a reverse taper of the same degree as the body member on the face which contacts said body member and an opposite face adapted to remain in constant parallelism with the longitudinal axis of said body member, and an annular carrier disk member encircling said body member and engaging said it:

jaw elements to maintain their position longitudinally of the body member.

4.. A clutching device adapted to fit at one end a spindle, said device comprising a tapered body member adapted at the opposite and smaller end for insertion into a core and having longitudinal grooves with bottom surface of a taper corresponding to that of said body member, jaw elements movable in the respective grooves and having a reverse taper of the same degree as the body member on the face which contacts the bottom surface of the grooves and an opposite face adapted to remain in constant parallelism with the longitudinal axis of said body member, and an annular carrier disk member encircling said body member and jaw elements to retain the latter and maintain their position longitudinally of the body member, said disk being nonrotatable with respect to the body member and only one of said members being axially movable.

EDWARD J. TENNY. 

